Enhancing Propylene/Propane Separation Performances of ZIF-8 Membranes by Post-Synthetic Surface Polymerization

Zeolitic-imidazole framework-8 (ZIF-8) membranes have shown exceptional propylene/propane separation performances. Their commercial applications have, however, been impeded by several challenges. One such challenge is the difficulty of managing microstructural defects...

Synthesis, Structure and Properties of the Grafted Peptidomimetic Polymer Brushes Based on Poly(N-methacryloyl-L-proline)

A new approach to synthesis at the aminated glass surface of novel biocompatible polymeric nanolayers consisting of poly(N-methacryloyl-L-proline) brushes has been developed. Formation of the polymer nanolayers has been realized in several stages. At the first stage, the glass surface has been modified by aminosilane (APTEC), afterwards monolayer of the peroxide-containing initiator (PI) based on pyromellitic acid has been tethered to this aminated surface. The immobilized PI has been used further for initiation of the grafting "from the surface" polymerization of N-methacryloyl-L-proline for obtaining of the peptidomimetic polymer brushes. Features of the reactions, as well as optimal conditions for performing the process are highlighted in this work. Presented here poly(N-methacryloyl-L-proline) grafted brush coatings are promising material for numerous applications in nanomedicine, especially for production of implants and systems of the controlled interaction with proteins and cells.

Directing on-surface polymerization via substrate-directed molecular template

Using template to control on-surface polymerization process is valuable for building functional molecular nanostructures. Here, the role of the symmetric matching between a halogen-ligand component (H2TBrPP) and substrate on the...